package com.example.myblog.controller.admin;

import com.example.myblog.entity.Blog;
import com.example.myblog.entity.User;
import com.example.myblog.service.BlogService;
import com.example.myblog.service.TagService;
import com.example.myblog.service.TypeService;
import com.example.myblog.viewobject.BlogQuery;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;

import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;


import javax.servlet.http.HttpSession;


/**
 * Created by asus on 2020/5/28 20:15
 */
@Controller
@RequestMapping("/admin")
public class BlogController {

    private static final String INPUT = "admin/blogs-input";
    private static final String LIST = "admin/blogs";
    private static final String REDIRECT_LIST = "redirect:/admin/blogs";

    @Autowired private BlogService blogService;
    @Autowired private TypeService typeService;
    @Autowired private TagService tagService;

    //直接获取所有的博客
    @GetMapping("/blogs")
    public String list(@PageableDefault(size = 5,sort = {"updateTime"},direction = Sort.Direction.DESC) Pageable pageable
                                , BlogQuery blogQuery, Model model){
        model.addAttribute("types",typeService.listType());
        model.addAttribute("page",blogService.listBlog(pageable,blogQuery));
        return LIST;
    }

    //动态查询之后的搜索显示，通过ajax映射到模板
    @PostMapping("/blogs/search")
    public String search(@PageableDefault(size = 5,sort = {"updateTime"},direction = Sort.Direction.DESC) Pageable pageable
                        , Blog blog, Model model, BlogQuery blogQuery){
        model.addAttribute("page",blogService.listBlog(pageable,blogQuery));
        return "admin/blogs :: blogList";
    }

    @GetMapping("/blogs/input")
    public String input(Model model){
        setTypeAndTag(model);
        model.addAttribute("blog",new Blog());
        return INPUT;
    }
    //封装部分方法
    private void setTypeAndTag(Model model){
        model.addAttribute("types",typeService.listType());
        model.addAttribute("tags",tagService.listTag());
    }

    //更新博客
    @GetMapping("/blogs/{id}/input")
    public String updateBlog(@PathVariable Long id, Model model){
        setTypeAndTag(model);
        Blog blog = blogService.getBlog(id);
        blog.init();
        model.addAttribute("blog",blog);
        return INPUT;
    }

    //添加博客
    @PostMapping("/blogs")
    public String addBlog(Blog blog, RedirectAttributes attributes, HttpSession session) {
        blog.setUser((User) session.getAttribute("user"));
        blog.setType(typeService.getType(blog.getType().getId()));
        blog.setTags(tagService.listTag(blog.getTagIds()));
        Blog b;
        if (blog.getId() == null) {
            b =  blogService.saveBlog(blog);
        } else {
            b = blogService.updateBlog(blog.getId(), blog);
        }
        if (b == null ) {
            attributes.addFlashAttribute("message", "操作失败");
        } else {
            attributes.addFlashAttribute("message", "操作成功");
        }
        return REDIRECT_LIST;
    }

    //删除博客
    @GetMapping("/blogs/{id}/delete")
    public String deleteBlog(@PathVariable Long id,RedirectAttributes attributes){
        blogService.deleteBlog(id);
        attributes.addFlashAttribute("message","删除成功");
        return REDIRECT_LIST;
    }

}
